Completa usando "can't" ou "couldn't".
1. I'd like to read Sue's email. The only problem is I ____ find my glasses.
2. Sandra didn't pass her spanish exam because she ____ answer the questions.
3. I'd like to invite my boyfriend to dinner at my house, but unfortunately I ____ cook.
4. Tom was really tired last night, but he ____ sleep.
5. People said she was a very interesting speaker, but I ____ understand her.
6. I've got two tickets for the cinema on Friday, but unfortunately Bill ____ come.
7. Mary's cat ran out of the house and she ____ catch it.
8. We had a guitar at home when I was younger, but I ____ play it.
9. (at the theatre) Those people in front of me are very tall. I ____ see the stage.